Boston Red Sox vs Seattle Mariners Home Run Picks Today (6/21)
In Summary
- Cal Raleigh is the headline home run bet for Boston Red Sox vs Seattle Mariners — best price +390 at Unibet.
- We compared every sportsbook's "to hit a home run" price for this game; the table below shows where each play pays the most.
- A home run prop's payout swings a lot book to book, so always take the best available number — that's the whole edge.
See the full slate: all of today's best home run bets, ranked by price, are in our MLB Home Run Picks Today hub.
Here are the top home run bets for Boston Red Sox vs Seattle Mariners on June 21, 2026, with the best price on each across 100+ sportsbooks. "To hit a home run" is the over 0.5 home runs market; the odds below are the best available right now, so shop them on the OddsShopper home run odds screen before you bet.
Best Home Run Bets for This Game
| Player | Best HR Price | Best Book | Implied | Books |
|---|---|---|---|---|
| Cal Raleigh (SEA) | +390 | Unibet | 20.4% | 27 |
| Willson Contreras (BOS) | +450 | TheScore | 18.2% | 25 |
| Julio Rodríguez (SEA) | +480 | Bally | 17.2% | 18 |
| Wilyer Abreu (BOS) | +510 | Unibet | 16.4% | 24 |
| Mitch Garver (SEA) | +600 | Unibet | 14.3% | 23 |
| Jarren Duran (BOS) | +600 | Bet365 | 14.3% | 23 |
| Weston Wilson (BAL) | +650 | Unibet | 13.3% | 15 |
| Rob Refsnyder (SEA) | +750 | Bet365 | 11.8% | 24 |
The Top Play: Cal Raleigh
Cal Raleigh carries the shortest home run price in this game at +390 (20.4% implied), and the best number is at Unibet across the 27 books pricing it. On a payout-driven market like home runs, the gap between the best and worst book is real money, so the number you take matters as much as the player you pick.
Best Value: Willson Contreras
For more payout, Willson Contreras is priced at +450 (18.2% implied), best at TheScore. Longer home run prices are high-variance by nature, so size these small and treat them as upside swings, not anchors.
Expert picks for this game
These are real plays from OddsShopper experts you can follow on Tails:
- FOTP on Tails (1881-1406 graded record) likes Seattle Mariners Under 3.5 Team Runs 5I (-120).
- PickTopLine on Tails (458-353 graded record) likes Seattle Mariners Moneyline (-118).
- MVPRO on Tails (1222-1166 graded record) likes Seattle Mariners Moneyline (-131).
- @BettingPix on Tails (525-392 graded record) likes C. Rafaela Over 0.5 Total Hits (-210).
More from these experts on Boston Red Sox vs Seattle Mariners. @BettingPix, FOTP, MVPRO, PickTopLine post full premium cards on Tails. See their cards on Tails.
How to Bet Home Run Props the Smart Way
- Shop every book. The same home run prop can pay 100+ points more at one book than another. OddsShopper scans 100+ sportsbooks so you always take the best number — see the live home run board.
- Mind the price, not just the name. A great hitter at a short price can be worse value than a mid-tier bat the market is sleeping on. Compare the price to the field before you fire.
- Size for variance. Home run props are longshots; keep the stakes small and play the long run.
New to OddsShopper? It scans 100+ sportsbooks in real time and flags the best price on every home run prop (and where it's actually +EV), doing automatically what this article did by hand. Try OS Pro free for 7 days, and code SMARTBET20 takes 20% off your first payment if you subscribe.
FAQ
Who has the best home run odds for Boston Red Sox vs Seattle Mariners today? Cal Raleigh at +390 (Unibet) is the shortest price; the table above lists the best book for every play. What does “to hit a home run” mean? It's the over 0.5 home runs prop — the player hits at least one home run. The odds and best book vary by sportsbook, so compare before betting. Where can I shop Boston Red Sox vs Seattle Mariners home run prop odds? OddsShopper's live home run board compares every sportsbook's price in real time so you always take the best number.
Odds shown are the best available as of publication and move quickly. Shop live prices on OddsShopper. Bet 21+ where legal; play responsibly.
